CBSE Class 10 Chemistry Worksheet - Revision (5)

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CBSE Class 10 Chemistry Worksheet - Revision (5)

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Q1. An iron salt ‘X’ on heating produces a brown coloured solid oxide

‘Y’ and releases suphur oxides. Identify X and Y. Which type of reaction

is this? Write balanced chemical equation for this reaction.

Q2. Identify the oxidizing agent and reducing agent in the following

equation.

Fe2O3 + 3CO -------> 2Fe + 3CO2

Q3. Define Rancidity? Why Potato chips should be kept in air tight

containers?

Q4. Rewrite the following chemical equation in the balanced form

NH3 + O2 -------> NO + H2O

Q5. A gas ‘X’ obtained from chlor-alkali process is used for preparing a

compound ‘Y’ which is used for disinfecting drinking water.

(1) Identify ‘X’ and ‘Y’.

(2) Write the chemical equation for preparation of ‘Y’ from ‘X’.

(3) Give uses of ‘X’ and ‘Y’

Q6.How is the concentration of the Hydroxide ion affected when the

following is added to sodium Hydroxide solution.

(a) Excess NaOH (b) distilled water

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